. >>> some towns like camden, new jersey, and san francisco, california, are offering cash for guns in an attempt to get weapons off the street. lee cowan reports on how a mass shooting in 1989 led to a tough new law. >> reporter: when it happened at cleveland elementary, in stock on the, california, some 23 years ago, some thought a school shooting couldn't get any worse. a troubled man with an assault rifle killed five students and wounded 29 others. while it sadly wasn't the last or worst school shooting in the country, it did lead to california's ban on assault weapons, the first in the nation. it wasn't a perfect solution in the eyes of gun enthusiasts but at least the ban was an effort to do something to stem the violence. in the wake of connecticut, many california leaders wonder where that resolve is today. >> if not after this, then seriously just shame on all of us. seriously, shame on the leadership of this country. >> gavin newsom is california's lieutenant governor, but his current anger stems from being a parent more than a politician. >> this has to be the moment where y